Do You Put a Period After 'US'? Style Guide Rules Explained

Learn when to use periods after 'US' in American English according to major style guides like Chicago Manual of Style and AP Stylebook.

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When referring to the abbreviation for the United States, placing a period after 'US' depends on the style guide you are following. In American English, it is common to use periods (U.S.) when using it as a noun, according to the Chicago Manual of Style. However, the Associated Press Stylebook suggests no periods (US) when using it as an adjective or noun. It's essential to stay consistent with the style guide chosen or follow the preference of the publication or institution for which you are writing.

FAQs & Answers

  1. Should I use periods after US when writing about the United States? It depends on the style guide you follow. The Chicago Manual of Style usually recommends using periods (U.S.), while the Associated Press Stylebook suggests omitting periods (US).
  2. When is it correct to write U.S. with periods? You typically use periods after 'U.S.' when following Chicago Manual of Style as a noun, for example, in formal writing or publications adhering to that style.
  3. Does AP Style require periods after the abbreviation US? No. The Associated Press Stylebook omits periods in abbreviations like US, both when used as an adjective and as a noun.
  4. Why is it important to stay consistent with the use of periods after US? Consistency in punctuation improves readability and professionalism, ensuring your writing aligns with the chosen or required style guide.

Watch More

For more writing tips and punctuation rules, check out our related videos on American English style guides, including how to abbreviate other common terms correctly and maintain consistent formatting in your writing.

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